(19)

(11)

EP 0 640 246 A1

(12)

(43) Date of publication: 01.03.1995 Bulletin 1995/09 (21) Application number: 93910744.0 (22) Date of filing: 23.04.1993

(51) International Patent Classification (IPC):  H05K 7/ 20( . ) (86) International application number: PCT/US1993/003821 (87) International publication number: WO 1993/023875 (25.11.1993 Gazette 1993/28)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB GR IE IT LI LU MC NL PT SE (30) Priority: 15.05.1992 US 19920883751 (71) Applicant: GEOTECH ENERGY CONVERSION CORPORATION Troy, NY 12180 (US)	(72) Inventor: O'CONNELL, Thomas, F. Spencertown, NY 12165 (US) (74) Representative: Hirsch, Marc-Roger, et al  Cabinet Hirsch 34 rue de Bassano F-75008 Paris F-75008 Paris (FR)